<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>圆角边框</title>
		<style>
		  #d1{
			  height: 200px;
			  width: 200px;
			  border: 10px solid greenyellow;
			  border-radius: 50% 20% 10% 1%;
		  }
		</style>
	</head>
	<body>
		<div id="d1">
			
		</div>
	</body>
</html>
